Iodine-rich mixed composition perovskites optimised for tin(IV) oxide transport layers: the influence of halide ion ratio, annealing time, and ambient air aging on solar cell performance

Masashi Ozaki; Yasuhisa Ishikura; Minh Anh Truong; Jiewei Liu; Iku Okada; Taro Tanabe; Shun Sekimoto; Tsutomu Ohtsuki; Yasujiro Murata; Richard Murdey; Atsushi Wakamiya

doi:10.1039/C9TA02142F

Iodine-rich mixed composition perovskites optimised for tin(iv) oxide transport layers: the influence of halide ion ratio, annealing time, and ambient air aging on solar cell performance†

Masashi Ozaki,^a Yasuhisa Ishikura,^a Minh Anh Truong,^a Jiewei Liu,^a Iku Okada,^b Taro Tanabe,^b Shun Sekimoto,^c Tsutomu Ohtsuki,^c Yasujiro Murata,

^a Richard Murdey

^a and Atsushi Wakamiya

*^a

Author affiliations

* Corresponding authors

^a Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
E-mail: wakamiya@scl.kyoto-u.ac.jp

^b Fine Chemicals R&D, Toda Research Center, Tokyo Chemical Industry Co., Ltd., Toda, Saitama 335-0033, Japan

^c Institute for Integrated Radiation and Nuclear Science, Kyoto University, Sen-nan-gun, Osaka 590-0494, Japan

Abstract

Iodine-rich mixed composition metal–halide perovskites were developed to improve the performance of perovskite solar cell devices incorporating tin(IV) oxide substrates for electron transport layers by optimizing the I/Br halide ion ratio. Device performance was further enhanced by exposing to ambient atmosphere over several days, which correlated with a shift of the energy levels in the perovskite and significant suppression of charge carrier recombination. A high power conversion efficiency of 20.6% was obtained for the aged device.

Journal of Materials Chemistry A

Iodine-rich mixed composition perovskites optimised for tin(iv) oxide transport layers: the influence of halide ion ratio, annealing time, and ambient air aging on solar cell performance†

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Iodine-rich mixed composition perovskites optimised for tin(IV) oxide transport layers: the influence of halide ion ratio, annealing time, and ambient air aging on solar cell performance

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